Miller Maxstar 150 STH Manual Del Operador página 19

Trouble
TIG welding problems: Wandering arc;
hard starts; poor welding characteris- hard starts; poor welding characteris-
tics; spattering problems.
TIG welding problems: Tungsten elec- g p g
trode oxidizing and not remaining bright t d idi i a d t ai i
after welding. after welding.
Use proper type and size of tungsten.
Use properly prepared tungsten.
Check and reverse electrode polarity.
Shield weld zone from drafts.
b i ht
Check for correct type shielding gas.
Check and tighten gas fittings.
Check and change electrode polarity.
Remedy
OM-2242 Page 15